Sash-lock.



J. HOLTZMAN.

SASH LOCK. APPLICATION FILED MAY 6. m5.

Patented Apr. 3, 1917 S vwewfoz 1 in windy weather.

JOHN HQLTZBIAN, OF NEW YORK, N. Y. ASSIGNOR F ONE-HALF TO BENJAMIN ROMAN;

OF NEW YORK, N. Y-

. sasn-LocK.

Specification of Letters Patent.

7 Application filed May 6, 1915. Serial No. 26,257.

To (ZZZ whom,- e'zf may concern:

Be it known that 1, JOHN HOLTZMAN, a citiren of the United States, and resident of the city of New York, in the county of New York and State of New York, have invented a certain new and useful Sash-Lock, of which the following is a specification.

This invention relates to sash locks that are intended for locking window sashes in anypartially opened position in the type of windows wherein an upper and a lower sash guided in ways are slidable upwardly and downwardly for opening and closing the w gndow. 3 1

provide a simplified, inexpensive, strong,

omically manufactured and sold at low cost, that can be conveniently and rapidly installation to lock the sashes, to be rendered inoperative, and to prevent unlocking thereof b a burglar or intruder reaching thereto with an implement from the exterior Another object of the inventionis to provide a simple inexpensive, and improved sash lock that will eflective'ly: lock the sashes and simultaneously operate to'autoinatically retain the sashes against their guiding waysat all times to prevent rattling of the sashes Other objects and advantages will hereinafter appear.

In the accompanying drawings,+

Figure 1 isa general side elevation of the lock showing itinoperative position.

Fig. 2 is a front elevation of the lock shown in. Fig. 1.

' Fig. 3 is a view similar to Fig. 1

but show ing the lock in inoperative position.

Figs. 4: and 5. are plan views of the lockbase and the lockingcain" respectively.

An upper window sash 1 and a lower window sash 2 are framed within guiding ways of the window-frame, not shown, whereby they are sl dable upwardly and downwardly for a enii I or closing the window to any greatel or lesser extent. -llhe sash lock 3 comprises a base 4 carrying a pivoted cam 5 and is fastened upon the top rail 6 of the lower sash 2 adjacent to one of the vertical sides 1 of the upper sashframe 1. Said base consists of a single piece.

The principal object of my invention is to thealaps 8 threading into the rail, and when the -lockis alined in tion the ears 9 of base dicularly properly secured posi I lare disposedperpen to the plane in which the sash l slides. A brace-pin 11 passes through openings 12 provided in the ears-9 and is riveted .111 place horizontally and perpendicularly thereto. 'Uponthe pin 11 is mounted the cam 5 winch consists of a single p1ece of sheet-metal punched out to form a segmental cam-plate 13, having a convex serrated cam-surface14 and wings 15 extending j from the cam plate perpendicularly theretonstalled by the purchaser, and that can be operated conveniently and efficiently after and parallel to each other. The wings 15.

are adapted to fit between the ears 9 and are provided with bearing-openings .16 which are fitted over the pin 11 in'the assembling of the lock, whereby the cam 5 is hinged upon said pin and the camplate 13 thereof its pivot toward and away from the sash 1 and toward and away from'th'e plane in which said sash slides. Said cam plate has its cam-surface 14 eccentric to and increasing in distance from the pin 11 as shown, and it normally bears against the side 1 of upper sash 1, whereby the cam is caused to bind against the upper sash upon any attempt to move this sashdownwardly or the lower sash 2 upwardly. And'th'e greater the force that, is applied to open either of the sashes the firmer doesthe cam'5 bindagainst the upper sash and thereby locks both sashes securely, while at the same time the upper sash 1 may be freely moved upwardly and the lower sash 2 downwardly if it is desired to close the window. A spring 17 having one end 18 secured to the pin 11- is wound therearound and has its other end 19 extending therefrom and disposed'upon the, inner surface of cam-plate 13. Said spring draws the cam 5v tending to turn it about the pin 11in a counter clockwise directiomas viewed in the drawing, and therefore tends to normally press the cam surface 14 against the sash 1, whereby a firm initial gripping of thecam' surface 14 against the Bash 1 is seen ed resulting in effective lock.

111g of the cam and the sashes. The spring l'Z also compels the cam-plate 13 to cause the sashes 1, 2 to bear againsttheir respective gulding ways and in this manner operates automatically to effectively prevent rattling of the windows at all times.

One of the wings 15 is made longer to extend beyond the pivot-pin l1, and a screw-20 having a knurled head 21 threads through the car 9 adjacent said wing in a direction perpe'ndicu'larly thereto and in the 'path of the movement of said wing so that when the lug-screw 20 until its extremity is alined flush with the inner surface of ear 9 Fig. 4:"

the vopei'ator may press downwardly upon wing 15- and therewith freelyswing the cam 5 from its operative position to the inoperative position shown 111 Fig. 3 and back, in order to set and lock the sashes 1n. any

partially opened position. Should it be desired to maintain the cam in released inoperative position, for cleaning the windowpanes or for any other purpose, the wing'lo may be pressed downwardly to dispose the cam '5 to the position shown in Fig. 3, and

the screw2O may be then threaded inwardly and aused to pass through an opening 23 provided in said wing, by which means the fam is firmly retained and securely locked away from-the sash .l. Unthroading of the locking-screw 20 to the-position shown in Fig. 4 at once'eauses the spring 17 to'restore the cam- 5 to its operative position in locked state against the sashl.

' In the assembling of the sash lock during its manufacture, the cam-wings 15 are inserted between the ears 9, a rivet constituting the brace pin 11 is passed through the openings in said wings and ears and through the wound portion of spring 17' and is rivetedin place to'hold said parts together, and upon securing the spring-end 18 to pin 11 and threading the lockingscrew 20 inwardly the. sash lock is at once rendered insures The installation of the lock merely requires to dispose the cam 5 so that the wing-edge 22 abuts against the screw 20, to aline the lock in proper disposition upon the sash rail 6 with its cam-face l4 bearing against the sash-side l and then the screws 10 may be threaded into the rail 6 through openings provided in the laps 8. Due to the laps 8 extending away from the remaining parts of the lock ample convenience is afforded in applying a screw driver for inserting the fastening screws therethrough when installing the sash lock.

It will be evident that the sash lock can be manufactured and sold at very low cost. so as to be within the purchasing reach of all users, and canbe readily installed by the mereinsertion of the screws 1o. Al'tcr installation the lock will carry out all of its functions efiicimitly, operate conveniently, and will never getout of order.

variationsmay be resorted to within the scope of the invention: and portions of the improvements may be used without others.

Having thus described my invention, 1 claim i 1.- A sash lock having the combination of abase adapted to be secured tothe lower window sash, a friction cam fulcrumed on said base havinga convex surface eccentric to the fulcrum adapted to frictionally engage the upper sash, means to press said cam against the upper sash, and a screw threading through said base having its shank inter posed to arrest movement of said cam whereby it will lock it in operative position.

A sash lock having the combination of a base adapted to be secured to the lower window sash, a friction cam. fulcrnmed on said base having a convex surface eccentric to the fulcrum adapted to frictionally engag the upper sash, means to press said cam againstthe upper sash, and a screw threading through said base having its shank in-- terposed to arrest movement of said cam whereby it will lock it in operative position and also in inoperative position.

Signed at the city oi New York. in the county of New York, and State of New York, this 5th day of May. A. l). 1915.

J OHN l l( )LTZMAN.

\Vitnesscs v C-nAs. \V. LA RUE, B. ROMAN. 

